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Editorial Team
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Asked: 2026-06-07T01:33:23+00:00

First of all I’m aware that my question is same as in here .

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First of all I’m aware that my question is same as in here. But that question did not helped me.

I have self signed applet.

jarsigner -verify sJSApplet.jar
jar verified.

Warning:
This jar contains entries whose signer certificate will expire within six months.

Applet’s purpose is to open MS Word document from LAN machine.
So far I’ve tried opening using Desktop.open() and Runtime.exec(). With AccessController.doPrivileged and without. I always get java.security.AccessControlException: access denied.

I’m out of options. What else I could do?

I cannot use java.policy file.

HTML

<html>
    <head>
        <script>
            function openFile( command ) {
                    var applet = "<object type='application/x-java-applet' height='100' width='100' name='jsApplet'><param name='code' value='com.avacoda.swing.JSApplet'/><param name='archive' value='sJSApplet.jar' /><param name='mayscript' value='true'/><param name='filePath' value='C:\\note.txt'/>Applet failed to run.  No Java plug-in was found.</object>";

                    var body = document.getElementsByTagName("body")[0];
                    var div = document.createElement("div");
                    div.innerHTML = applet;
                    body.appendChild(div);
            }
        </script>
    </head>
    <body>
        <a href="#" onclick="openFile('C:/note.txt');">Open file</a>
    </body>
</html>

Java code:

public class WordApplet extends JApplet {

    @Override
    public void init() {
        openFile(getParameter("filePath"));
    };

    public void openFile(final String path) {
        AccessController.doPrivileged(new PrivilegedAction<Object>() {

            @Override
            public Object run() {
                try {
                        Runtime.getRuntime().exec("winword " + path); 
                        //Desktop.getDesktop().open(new File(path));
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        });
    }
}

Full stack trace

java.security.AccessControlException: access denied (java.io.FilePermission <<ALL FILES>> execute)
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkExec(Unknown Source)
    at java.lang.ProcessBuilder.start(Unknown Source)
    at java.lang.Runtime.exec(Unknown Source)
    at java.lang.Runtime.exec(Unknown Source)
    at java.lang.Runtime.exec(Unknown Source)
    at com.test.applet.JSApplet$1.run(JSApplet.java:34)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.avacoda.swing.JSApplet.openFile(JSApplet.java:29)
    at com.avacoda.swing.JSApplet.init(JSApplet.java:25)
    at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
basic: Applet initialized
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1 Answer

  1. Editorial Team

    There is nothing wrong with code samples above. Both cases Desktop.getDesktop().open() and Runtime.getRuntime().exec() works perfectly.

    My problem was badly packaged jar.

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